@mozart Hi mozart this is an interesting topic that you have brought up. I have a son2 with autism and schizophrenia and assorted other problems. He has always had strange bowel movements and I know from other parents with autistic children they have noticed similar problems. I give him a pro biotic and had him on various diets when he was younger to help with is autistic problems both physical and mental.
My son1 has depression and is currently being looked at for bipolar 2 he has crohns disease .... so to answer your question I believe there is a gut brain connection with all these types of disorders which hasnt been fully looked at.